Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f75e583f7f8732…

MALICIOUS

PDF

77.0 KB Created: 2021-01-22 04:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 036b84e1f76a4add6bec67f58a336915 SHA-1: b79d34e469e5587926565cf16e3212277814b69a SHA-256: 04f75e583f7f873275644817a1ee6a959bc3f70b837ab071ed3dffe657a3b44a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure, specifically pointing to 'crophysi.ru'. This URL is presented in a context that mimics a search result for a game, suggesting a phishing or malware lure. The ML classifier and ClamAV detection further support the malicious nature of this PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/wb?keyword=zombie%20combat%20simulator%20ios In PDF document text
    • http://nefuwumimo.iblogger.org/1928117030.pdfIn PDF document text
    • https://cdn.sqhk.co/tosemixuru/hHjb3ha/45900291483.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jVunhfF/rolavazegagowowawoxena.pdfIn PDF document text
    • https://site-1176955.mozfiles.com/files/1176955/jolteon_pokemon_quest.pdfIn PDF document text
    • https://site-1167933.mozfiles.com/files/1167933/george_carlin_7_dirty_words_gif.pdfIn PDF document text
    • https://site-1176586.mozfiles.com/files/1176586/xozimozevorur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5ff0d8ccd1562.pdfIn PDF document text
    • https://cdn.sqhk.co/ninasodivofi/ahbiijc/wedugot.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/ohgfbc6/92825200726.pdfIn PDF document text
    • https://site-1177693.mozfiles.com/files/1177693/popular_car_driving.pdfIn PDF document text
    • https://site-1178703.mozfiles.com/files/1178703/bawadisuriwa.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/Sha5icm/who_is_the_best_ice_hockey_player_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/galinikagopit/rosezurosazale.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/10540069474.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/pafedutuj.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/15921772442.pdfIn PDF document text
    • http://winuzuvejifod.epizy.com/winky_d_songs_free.pdfIn PDF document text
    • http://pepajefosub.epizy.com/p_b_name_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/restaurant_le_homard_bleu_le_treport.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 4816 bytes
SHA-256: b91567159da5e66aafe3381395e2f495e6f9b2617dfe06e0eff3dc8dc18078c2
font_01_sfnt_off0000f0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C6 12200 bytes
SHA-256: 935fcdc961d61225586f8db053b99d914c5e9ab7c6930e3153b8c251b047269f
font_02_sfnt_off000118f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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